Useful tool to demonstrate the four conic sections. Add a piece of paper to show an interesting plane!
Magnets are 8mm x 3mm (diameter x depth).
The hardest / most fragile part is the middle. To support it and prevent it from easily breaking when it is inevitably dropped, I printed it at 80% infill and left cylinder which I placed a 3.5mm nail through. Rest of the parts can be printed at any infill, but best to stay on the lighter side.
The author marked this model as their own original creation.